1. Mofuta oa sehlahisoa le litlhaloso
Ho na le mefuta e mengata ea lihlahisoa tsa cellulose ether, 'me mefuta e fapaneng e na le phapang e totobetseng ea ts'ebetso. Li-cellulose ethers tse tloaelehileng li kenyelletsa hydroxypropyl methylcellulose (HPMC), hydroxyethyl cellulose (HEC), carboxymethyl cellulose (CMC), joalo-joalo Lihlahisoa tsena li na le masimo a fapaneng a kopo le litšobotsi ho latela mekhoa e fapaneng ea lik'hemik'hale le mekhoa ea tlhahiso.
HPMC: Haholo-holo e sebelisoa ho thepa ea mohaho, meriana, lijo le masimo a mang, ka ho teteka hantle, ho etsa lifilimi, ho boloka metsi le ho khomarela.
HEC: E sebelisoa haholo ka ho roala, likhomaretsi, li-detergents, tse nang le botenya bo botle haholo, botsitso le ho qhibiliha ha metsi.
CMC: E sebelisoa haholo lijong, lik'hemik'hale tsa letsatsi le letsatsi le indasteri ea ho etsa pampiri, 'me e na le liphello tse ntle tsa ho teteka le ho tsitsisa.
Ha u khetha mofuta o nepahetseng oa cellulose ether, hoa hlokahala ho hlakisa tšimo ea eona ea ts'ebeliso, litlhoko tsa ts'ebetso le lintlha tse ikhethileng, joalo ka viscosity, degree of substitution, joalo-joalo.
2. Viscosity
The viscosity ea lihlahisoa tsa cellulose ether ke pontšo ea bohlokoa ea ts'ebetso, e tla ama ka ho toba thepa ea rheological, solubility le phello ea tšebeliso ea sehlahisoa. Viscosity ea cellulose ether e ka fetoloa ho latela litlhoko tsa kopo:
High viscosity cellulose ether: e sebelisoa haholo lits'ebetsong tse hlokang phello e matla ea ho teteana le ho boloka metsi a mangata, joalo ka seretse sa moaho le likhomaretsi. Mofuta ona oa cellulose ether o ka ntlafatsa ho boloka metsi le ho sebetsa ha thepa.
Low viscosity cellulose ether: e sebelisoa haholo lits'ebetsong tse nang le litlhoko tse phahameng tsa ho solubility le mokelikeli, joalo ka litlolo, li-detergents le likarolo tse ling, tse thusang ho ntlafatsa metsi le boreleli holim'a metsi.
Ha viscosity e phahame, ho thata le ho feta ho qhaqha. Ka hona, khetho ea lihlahisoa tse nang le viscosity e loketseng e hloka ho nahaneloa ka botlalo mabapi le ts'ebetso ea kaho kapa ts'ebetso le litlhoko tsa lihlahisoa tsa ho qetela.
3. Tekanyo ea mofuta oa ho fetola le ho fetola
Thepa ea lik'hemik'hale le litšobotsi tsa tšebeliso ea cellulose ether e itšetlehile ka mofuta le palo ea lihlopha tsa eona tse emeng. Tekanyo ea ho nkela sebaka e bolela tekanyo eo lihlopha tsa hydroxyl ka har'a molek'hule ea selulose li nkeloang sebaka, hangata e hlahisoang e le palo e tloaelehileng ea li-substitute ho yuniti ea tsoekere (mohlala, hydroxypropyl, methyl, carboxymethyl, joalo-joalo). Mofuta le tekanyo ea ho nka sebaka sa substituent ka ho toba ama solubility, thickening bokhoni le ho hanyetsa letsoai ea selulose ether.
Tekanyo e phahameng ea substitution cellulose ether: e na le ho qhibiliha ha metsi hantle le mocheso o tlase oa gelation, o loketse lits'ebetso tse hlokang ho qhibiliha ha metsi kapa ho sebetsa ha mocheso o tlase.
Tekanyo e tlase ea substitution cellulose ether: e ka ba le mocheso o phahameng oa gel le ho qhibiliha ho fokolang ha metsi, tse loketseng masimo a mang a khethehileng joalo ka tlhahlobo ea sebaka sa oli kapa tikoloho ea mocheso o phahameng.
Ntle le moo, li-substituents tse fapaneng li tla fa cellulose ethers lisebelisoa tse fapaneng tsa lik'hemik'hale, joalo ka carboxymethyl cellulose e na le khanyetso e ntle ea letsoai le botsitso ba tharollo.
4. Sollubility
Lihlahisoa tsa boleng bo phahameng ba cellulose ether li hloka ho ba le solubility e ntle e le hore li ka qhalakanngoa ka potlako le ho etsa tharollo e tsitsitseng nakong ea tšebeliso. Solubility e angoa ke lintlha tse kang sebaka, viscosity le boholo ba karolo ea sehlahisoa. Li-cellulose ethers tse ntle li lokela ho khona ho qhibiliha ka potlako metsing a batang ho etsa tharollo ea colloidal e tšoanang, 'me ha e na tšekamelo ea ho kopana kapa ho hasana ho sa tšoaneng.
Lipontšo tse kang sekhahla sa ho qhibiliha le ponaletso ea tharollo le botsitso ba viscosity li ama ka ho toba ts'ebetso ea ts'ebetso ea sehlahisoa lits'ebetsong tsa sebele. Ka hona, ha u khetha ether ea cellulose, hoa hlokahala ho netefatsa hore na e na le solubility e phahameng le botsitso boemong bo sebelisoang.
5. Boholo ba likaroloana
Boholo ba likaroloana tsa lihlahisoa tsa cellulose ether le tsona li tla ama sekhahla sa ho qhibiliha le phello ea ts'ebeliso. Li-ethers tsa "fine-particle cellulose ethers" hangata li qhibiliha ka potlako 'me li hasana ka mokhoa o ts'oanang, tse loketseng litšoantšo tsa ho hahoa kapa ho sebetsa ka potlako, ha li-ethers tsa cellulose li ka qhibiliha butle, empa li ka tšoarella haholoanyane lits'ebetsong tse ling.
Hangata, boholo ba karoloana ea cellulose ether bo bonts'oa leiboleng la sehlahisoa, mme bahlahisi ba ka boela ba etsa lihlahisoa tsa boholo bo fapaneng ho latela litlhoko tsa mosebelisi ho ikamahanya le lits'ebetso tse fapaneng tsa ts'ebetso.
6. Bohloeki le botsitso ba boleng ba lihlahisoa
Boleng ba cellulose ether bo ama ka ho toba phello ea ts'ebeliso ea eona, haholo-holo masimong a nang le litlhoko tsa boleng bo phahameng tse kang lijo le meriana, bohloeki ba sehlahisoa ke tekanyo ea bohlokoa. High-purity cellulose ether e lokela ho ba le litšila tse fokolang 'me e ke ke ea e-ba le tšusumetso e mpe ho' mala, monko, tatso le ts'ebetso ea sehlahisoa sa ho qetela.
Ho phaella moo, botsitso ba boleng ba sehlahisoa le bona ke ba bohlokoa. E le ho etsa bonnete ba ho lumellana ha sehlahisoa ka lihlopha tse fapaneng, hoa hlokahala ho khetha moetsi ea nang le tsamaiso e thata ea ho laola boleng. Botsitso ba boleng ba nako e telele bo ka fokotsa liphapang tse ka 'nang tsa etsahala nakong ea tšebeliso, kahoo ho netefatsa liphello tse tsitsitseng nako le nako.
7. Litšoaneleho le litšebeletso tsa mofani oa thepa
Ho bohlokoa hape ho khetha morekisi ea tšepahalang oa cellulose ether. Mofani oa thepa ea boleng bo phahameng ha aa lokela ho ba le bokhoni bo botle ba tlhahiso le taolo ea boleng feela, empa hape a khone ho fana ka ts'ehetso ea botekgeniki ea litsebi le tšebeletso ea morao-rao ea thekiso.
Litšoaneleho tsa mofani oa thepa: Utloisisa litšoaneleho tsa tlhahiso ea mofani oa thepa, boiphihlelo ba indasteri, boemo ba setifikeiti (joalo ka setifikeiti sa ISO, joalo-joalo) le hore na e na le litlhoko tsa mangolo a thuto mafapheng a amanang.
Tšehetso ea tekheniki: Barekisi ba hloahloa ba lokela ho fana ka tataiso ea kopo ea sehlahisoa ho latela litlhoko tsa bareki ho netefatsa hore bareki ba ka sebelisa lihlahisoa ka nepo le ho fumana litholoana tse ntle.
Tšebeletso ea ka mor'a thekiso: Ho bohlokoa hape ho khetha barekisi ba ka fanang ka tšehetso ea tekheniki ka nako le tharollo ea mathata.
8. Litšenyehelo le ho sebetsa ka katleho
Theko ea lihlahisoa tsa cellulose ether e fapana ho latela boleng, mofuta le litlhaloso. Ha u khetha sehlahisoa, ha ua lokela ho latela theko e tlase feela, empa u lokela ho nahana ka botlalo ts'ebetso ea sona, phello ea ts'ebeliso le litšenyehelo tsa ts'ebeliso. Maemong a mang, le hoja li-ethers tsa boleng bo phahameng ba cellulose li theko e boima haholo, li bontša ts'ebetso e ntlafetseng ha li sebelisoa, li ka ntlafatsa katleho ea tlhahiso kapa tsa ntlafatsa boleng ba sehlahisoa, 'me li na le litšenyehelo tse phahameng.
Ha u batla lihlahisoa tsa boleng bo holimo tsa cellulose ether, u lokela ho nahana ka hloko mofuta oa sehlahisoa, viscosity, tekanyo ea ho fetola, ho qhibiliha, boholo ba likaroloana, ho hloeka, le botsitso ba boleng ho latela litlhoko tsa sebele tsa kopo, hape u hlahlobe litšoaneleho le litšebeletso tsa mofani oa thepa. Ke feela ka ho bapisa ka botlalo ts'ebetso le katleho ea lihlahisoa tse fapaneng moo re ka fumanang li-ether tsa cellulose tse loketseng ho fihlela litlhoko tsa liindasteri tse ikhethileng le maemo a ts'ebeliso.
Nako ea poso: Sep-13-2024